Compound for carburizing metal and process of forming the same



, UNITED STATES JOSEPH n. nouns, or: niennnivn than, MICHIGAN, essisnoa T0 PARK cnnivixcan PATEN omes.

COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

COMPOUND non cAnBUn-Izme METAL mun rnoonssor romaine. THE SAME.

No Drawing.

citizen of the United States of America, 1'6

siding at Highland Park, in'the county of Wayne and State of Michigan, have invented certain new and useful Improvementsin Compounds for Carburizing Metals and Processes of Forming the Same, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to materials for case-hardening or the .like, and also particularly refers to the method of manufacturing such materials.

Among the objects ofthe invention are to provide a material and method of making the same whereby the energizing agent or agents can be mixed with a carbonaceous material in such a manner that the energizing agent will not separate out to any material extent when handled, such as in shipping; to provide a compound and method of making the same whereby the necessity of usin asphaltum or like tacky binders is avoieed; and in general to provide an improved material of the character above referred to and process of making such material.

Describing in detail one compound which embodies my invention and the material and process of making the same is as follows:

Small pieces or granules of charcoal, coke,

charred leather or the like of about corn thoroughly mixed so that all parts of the carbonaceous material will be treated with.

the solution of the energizing agent.

lVhile various energizing agents may be employed and the proportions varied with out departing from the scope of my invention, I have found that an effective mate rial for case-hardening or the like can be produced where eighty pounds of the carbonaceous material are treated with a water solution of eight pounds of barium carbonate, six pounds of calcium carbonate and six pounds of sodium carbonate, these carbonates being dissolved or held in suspension in about five gallons of water.

It is to be noted that the sodium carbonate Specification of Letters Patent.

Fatented Nov. 9. 1920.

Application filed September 4, 1917: S'eriaINo. 189,622.

being soluble in water will be held in solution, while the barium carbonate anducal- I cium carbonate are merely held in suspen sion. The water ofthe mixture during the Y leaving a dry and uniform" carbonaceous material to which the energizing agents have been supplied. The volume of water to be used is to some extent dependent uponthe temperature of. the carbonaceous material,

that is, there should be suilicient water to carry in suspension orso'lutionthe' necessary.

percentage of energizing agent, whileat the same time it is desirable that only such quantity of water be appliedwas will be on tirely evaporated by the heating of charcoal or other material.

A compound produced by the above process has the energizing agent so affixed to the relative inactive carbonaceous material as to prevent any material separation of the energizing agent from the granules of the charcoal, coke, etc. This avoids the necessity of using a binding material or fusing the energizing agent into the carbonaceous material, which latter is objectionable, in that, it often changes materially the composition of the energizing agents. A further advantage is derived, in that, where charcoal or other shrinkable material is employed, the harmful shrinkage when the iaterial is employed in the case-hardening operation is materially reduced. lVhile I have described the use of certain materials and in certain proportions, I do not wish to limit my invention to such mixtures nor to the particular substances and proportions named.

What I claim as my invention is 1. The process of producing material for case-hardening or the like which comprises subjecting carbonaceous material to heat and spraying such material with a mixture containing energizing agents while the carbonaceous material is in its heated condition.

2. The process of producingmaterial for case-hardening or the like which comprises subjecting carbonaceous material to heat and spraying such material with a liquid mixture containing energizing agents while the carbonaceous material is subjected to a substantially red heat.

3. The process of producing material for case-hardening or the like which comprises sub ect1ng carbonaceous material to heat 7 and spraying such material with a water mixture containing energizing agents while the carbonaceous material is in its heated condition and mixing "said material while it is subjectedto the spraying action.

4; The process of producing material for case-hardening or the like which comprises heating small particles of carbonaceous materialymixingf energizing agents with Water in such proportion that the water will be evaporated when the carbonaceous material is-sprayed'with the waterrmixture, and applying the water mixture to the carbonaceous' material when the latter is in its heated condition.

5. The process otproducing material for case-hardening or the like which comprises subjecting substantially corn-size particles oi carbonaceousmaterial to high vheat and while heated mixing it with a liquid containing energizing agents.

6. The process of producing material for" case-hardening or the like which comprises subjecting substantially corn-size particles l s e of carbonaceous material to high heat and while heated mixing it with a liquid 0on taming energlzmg agents," and agltatlng the 8. In the process of producing material for case-hardeningor the like, the subject of carbonaceous material to heat and the spraying of such material with water containing sodium carbonate insolution and calcium and barium carbonates in suspension while such material is heated. i

In testimony whereof I afiix my signature.

JOSEPHN. Boone. 

